body,ol,ul,h1,h2,h3,h4,h5,h6,p,th,td,dl,dd,form,input,textarea,select{margin: 0;padding: 0;}
body{font:16px "microsoft yahei",'宋体',"Arial Narrow",HELVETICA;background: #fff;-webkit-text-size-adjust: 100%;}
a{color: #2d374b;text-decoration: none}
em{font-style: normal}
li{list-style: none}
img{border: 0;vertical-align: middle}
table{border-collapse: collapse;border-spacing: 0}
input,button{
    outline: none;
    border: 0;
}
.clearfix::after{
    content: '';
    display: block;
    clear: both;
}
a img:hover{
    opacity: 0.5;
}